For Presentation 1: 9 Ten Bead Bars
For Presentation 2: Seguin Board A.
For Presentation 3: Seguin Board A.
The number of Golden Beads, and the Short Bead Stair which should be built in a triangle, provide the child with the correct number of beads in the right order so that the quantities can be built without error.
Because the Short Bead Stair is built in a triangle, the child need only has to take the next bar from the triangle and the order 11 to 19 will be controlled.